httpclient通过post multipart/form-data 上传文件

public static String httpClientUploadFile(String url, File file) { CloseableHttpClient httpClient = HttpClients.createDefault(); String result = ""; //每个post参数之间的分隔。随意设定，只要不会和其他的字符串重复即可。 String boundary ="--------------4585696313564699"; try { //文件名 String fileName = file.getName(); HttpPost httpPost = new HttpPost(url); //设置请求头 httpPost.setHeader("Content-Type","multipart/form-data; boundary="+boundary); //HttpEntity builder MultipartEntityBuilder builder = MultipartEntityBuilder.create(); //字符编码 builder.setCharset(Charset.forName("UTF-8")); //模拟浏览器 builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); //boundary builder.setBoundary(boundary); //multipart/form-data builder.addPart("multipartFile",new FileBody(file)); // binary// builder.addBinaryBody("name=\"multipartFile\"; filename=\"test.docx\"", new FileInputStream(file), ContentType.MULTIPART_FORM_DATA, fileName);// 文件流 //其他参数 builder.addTextBody("filename", fileName, ContentType.create("text/plain", Consts.UTF_8)); //HttpEntity HttpEntity entity = builder.build(); httpPost.setEntity(entity); // 执行提交 HttpResponse response = httpClient.execute(httpPost); //响应 HttpEntity responseEntity = response.getEntity(); if (responseEntity != null) { // 将响应内容转换为字符串 result = EntityUtils.toString(responseEntity, Charset.forName("UTF-8")); } } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } System.err.println("result"+result); return result; } //main 方法 public static void main(String[] args) { httpClientUploadFile("http://127.0.0.1:8080/upload",new File("d:/test/test.docx")); }